Duplex heater.



PATENTED JUNE '7, 1'9'04. E. BARNUM. DUPLEX HEATER.

` l UNITED STATES Patented June 7, 1904 PATENT OFFICE.

' DUPLEX HEATER.

SPECIFICATION forming part of Letters Patent No. 761,869, dated. J une '7, 1904-..

Application filed December 15, 1903. Serial Nn. 185,230. (No model.)

Tartu whom it may concern:

Be itknown that I, ENOCH BARNUM, a citizen of the United States, residing at Kansas City, in

'j heat prevents effective radiation of the heat from the interior of the drum to theair inthe compartment containing the same.

' The invention consists in the novel construction, arrangement, and combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, which illustrate the invention, Figure'l represents a vertical sectional View of the apparatus connected to a stove, located in alower compartment. Fig. 2 is a vertical section of the apparatus, taken on line II II of Fig. 1. Fig. 3 isa plan view of the same with the lid removed from the outer casing. Fig. 4 is a vertical section of a modified form, showing the apparatus provided with means for operating the inner drum without disconnecting the outer casing from the outlet-pipe.

In carrying out the invention I employ an outer casing 1, comprising a cylindrical wall 2, a conical-form bottom 3, provided at its lower end with a collar 4C, and a lid 5, provided with a centrally-disposed collar 6 and a depending flange 7, which latter iits down snugly over the upper portion of the wall 2 to prevent`the escape of smoke or other products of combustion into the compartment containing the apparatus. Casing 1 is mounted upon'a plurality of tapering sheet-metal supporting-legs 8, which support it above the floor, so collare may be readily connected to a pipe 9, communicating at its-lower end with a heating stove or furnace 10. Collar 6 is connected tory@f a pipe 11, which conducts the smoke from casing l to the chimney.

12 designates a pair of oppositely-disposed cleaning-rods riveted at their upper ends to the upper interior portion of wall 2 and eX- tend downwardly in contact therewith a suitable distance, then extend inwardly a short distance at an angle of about forty-five degrees, and then downwardly to a point near the conical-form bottom 3, where they are united by a pair vof brackets 13, secured at Y their opposite ends to `conical bottom 3 and the under side of the transverse bar.

The heat on entering the outer casing from pipe 9 is deflected against the surface of wall 2 by an inner drum 14, comprising a cylindrical wall 15, a conical top 16, and a iiat-bottom portion 17 which rests upon the transverse bar 13. The drum is of less diameter than wall 2 in order to leave an annular intervening space 18 for the passage of the products of combustion from pipe 9 to pipe 11.

19 designates a second pair of oppositelydisposed cleaning-rods paralleling the interior surface of wall 2, bottom 3, and the upper interior portion of pip'e 9, and said rods are united at their upper ends by a transverse bar paralleling the under surface of lid 5 and forming a convenient handle 20. Rods 19 are se` cured at their upper terminals to the upper 8o opposite sides of the drum by brackets 21 and/ at their lower ends to the lower opposite sides of the drum by brackets 22. By disconnecting pipe 11 from collar 6 access may be had to handle 20 through said collar, so that by grasping and rotating the handle nearly onehalf Aa revolution in opposite directions the drum and cleaning-rods 19 will be carried therewith, so the latter will scrape the vsoot from the interior of wall 2 and bottom 3, while the stationary cleaning-rods 12 will scrape the soot from the sides and bottom of the drum. As bottom 3 vis conical and the soot falling thereon will be agitated by the contacting portions of rods 19, the soot will fall through pipe 9 back into the stove, where it is consumed or may be removed in the usual manner. While stationary or in operation the drum is held substantially concentric with the interior surface of wall 2 by the cleaningrods 12 and 19. The steep inclination of conical top 16 affords but little opportunity for the soot to lodge thereon; but as the greater portion of the heat has been radiated before reaching said top the accumulation of soot thereon will have little or no effect upon the result.

Should the inner drum burn out or it become necessary to make repairs to said drum and the cleaning-rods, access may be readily had thereto by removing lid 5.

1n practice a slight space is preferably left between the cleaning-rods and the drum and casing to allow for any unevenness in the surface of the latter caused by seams or failure 'M rnake walls 2 and 15 perfectly cylindrical.

'1he modified form shown in Fig. 4 shows means for operating the inner drum from the exterior of casing 1, and consists of a rod 23, extending inwardly through an aperture 23n in the easing and pivotally secured at its inner end to one of the cleaning-rods 19. The drum is pivotally mounted on pins 24 25, secured to bar 13 and a bar 20, respectively, which latter is secured to the underside of lid `5*.4` Prin 25 projects through a central aperture in landle 20, and pin 24 projects upwardly into a conical recess 26 in the central portion of the drum-bottom 17. By thus pivotally mounting the drum friction caused by contact with cleaning-rods 12 is avoided. y From the above description it is apparent that I have produced an apparatus which is simple in construction, economical to manufacture, and thoroughly effective for the purpose intended.

Having thus described my I claim, and desire to secure ent, is-

1. An outer casing, cleaning-rods secured to the interior thereof, an inner drum loosely supported upon the cleaning-rods and having a bottom and side walls paralleling the latter, and cleaning-rods secured to the inner drum and paralleling the inner surface of the outer drum.

" 2. An outer casing, supporting-legs secured thereto, cleaning-rods secured to the interior of the outer casing, an inner drum loosely supported upon the cleaning-rods and having a bottom and side walls paralleling said cleaning-rods, and cleaning-rods secured to the ininvention, what by Letters Patner drum and paralleling the inner surface elA the outer drum.

3. An outereasing, arelnovablelid forclesing the upper end thereof, cleaning-rods secured to the interior of the outer easing, an inner drum loosely supported upon the cleaning-rods and having a bottom and side walls paralleling the cleaning-rods, and cleaning'- rods secured to the inner drum and paralleling the inner surface of the outer drum.

et. An outer casing comprising a cylindrical wall, a conical-form bottom portion, and a lid closing the top thereof, in con'ibination with a pair of cleaning-rods secured to the interior of the casing, an inner drum loosely supported upon the cleaning-rods and having a bottom and side walls paralleling the cleaningrods, and cleaning-rods secured to the inner drum and paralleling the inner surface ol the outer drum.

5. An outer casing, cleaning-rods secured at their upper ends to the upper interior surface of the outer casing and which extend inwardly and downwardly a slight distance from the interior surface of said casing, a transverse bar uniting the lower ends of the cleaningrods, and an inner drum supported by the transverse bar and .having its side wall arranged adjacent to and parallel uith the cleaning-rods.

6. A cylindrical outer casing, an inner drum loosely supported therein, eleaningrods secured to the drum and arranged adjacent to and parallel with the inner surface of the wall and bottoni of the casing, and a transverse handle uniting the upper ends of the cleaningrods.

7. An outer cylindrical casing, a transverse bar suitably secured therein, a d rum located within the outer casing and comprising a cylindrical wall, a conical top and a flat bottom portion which latter rests upon the transverse bar; cleaning-rods secured to the druln and paralleling the adjacent interior surface of the wall of the outer casing, and a handle for operating the drum and the cleaning-rods.

ln testimony whereof lA aiiix my signature in the presence of two witnesses.

ENOCH BARN U M.

1V itnesses:

F. G. FISCHER, T. A. HICKEY.

lOO 

